function s1_goto_dir() {
	cd "$1"
}
function s2_touch_empty_file_with_given_name() {
	touch "$1"
}
function s3_make_directories() {
	mkdir -p projects/git projects/backup
}
function s4_create_6_files() {
	touch projects/linux1_centos projects/linux1_redhat projects/linux1_c_programming projects/linux2_centos projects/linux2_redhat projects/linux2_c_programming
}
function s5_make_directories_in_git() {
	mkdir projects/git/linux1 projects/git/linux2
}
function s6_move_files_to_dir_1_or_2() {
	mv projects/linux1_* projects/git/linux1/
	mv projects/linux2_* projects/git/linux2/
}
function s7_create_package_and_compress() {
	tar -czvf projects/backup/git.tar.gz -C projects git
}
function s8_delete_dir_git() {
	rm -rf projects/git
}
function s9_recover_from_git_tar_gz_backup() {
	tar -xzvf projects/backup/git.tar.gz -C projects
}
function s10_create_package_and_compress() {
	tar -jcvf projects/backup/git.tar.bz2 -C projects git
}
function s11_find_and_sort_alphabetically_all_created_files_and_dirs() {
	find ./projects | sort
}
function s12_get_next_15_minutes_boundary() {
	date -d "$(( (($(date +%M)/15 +1)*15 )) minutes" +"%Y-%m-%d_%H:%M:00)"
}
